Help anyone know how to do this type of problem

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Homework Help Overview

The problem involves a boy riding on a merry-go-round, where he must exert a force to avoid being thrown off. The discussion centers around concepts of circular motion, specifically centripetal force and acceleration, as well as the relationship between mass, speed, and radius in this context.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants explore the type of acceleration experienced by the boy and question the application of formulas related to centripetal force. There are discussions about the meaning of symbols in the equations and the relevance of different masses in the context of the problem.

Discussion Status

The discussion is active, with participants providing guidance on relevant formulas and clarifying concepts of acceleration. There is an exploration of different interpretations of the problem, particularly regarding the variables involved and their physical meanings.

Contextual Notes

Some participants express uncertainty about the application of certain formulas and the presence of multiple masses, indicating a need for clarification on the assumptions underlying the problem setup.

tboltzsoccer
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A boy of mass 41 kg rides on a playground merry-go-round at a speed of 2.0 m/s. and has to hold on with a force of 79 N to keep from flying off. What is the radius of the merry-go-round?
 
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Ask yourself the following:
What type of acceleration does the boy experience?
 
Yes, a lot of people know how to do that type of problem. The real question is what have you tried so far? :)
 
F=M1*M2/R but i dono if that's right
 
tboltzsoccer said:
F=M1*M2/R but i dono if that's right
Do you know what your symbols mean?
 
Yes, but it seems as if there is only one mass the mass of the boy i didnt know wher the second mass would come from that's why it staryed me away from this equation but i wasnt sure what else i coudl use
 
tboltzsoccer said:
Yes, but it seems as if there is only one mass the mass of the boy i didnt know wher the second mass would come from that's why it staryed me away from this equation but i wasnt sure what else i coudl use
So you just pick some formula out of thin air and hope you can apply it to a given situation??

What is acceleration, what dimensions does it have?
 
its centripital acceleration
 
tboltzsoccer said:
its centripetal acceleration
Correct. What are the physical dimensions of acceleration?
Do you see those anywhere in your formula?
 
  • #10
F=mv^2/r possibly
 
  • #11
tboltzsoccer said:
F=mv^2/r possibly
That is correct.
Now, what is the unkown quantity in that equation?
 
  • #12
radius so would it be .481
 
  • #13
A airplane flies in a circle of radius 1.0 km at a constant speed of 1248 m/s. What is the centripetal acceleration of the airplane in km/s/s?
would the centripetal accel be = (to v^2/r) or (1248^2)/1 which would be 1557504 km/s/s
 

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